PRODUCT APPLICATIONSNylon garage roller replacements are designed for various doors and are widely used in residential garage doors, commercial garage doors, sectional overhead doors, side-hinged doors, barn doors, and warehouse doors.PRODUCT DETAILS & INCLUDE√ Material: Nylon, Carbon Steel√ Color: Black√ Roller diameter: 46 mm/ 1.81"; Roller thickness: 12 mm/ 0.47"; √ Length: 120 mm/ 4.72";√ Rod Diameter: 10.3 mm/ 0.41";√ Rod Length: 108 mm/ 4.25";√ Package Includes: 4-Pack x Garage Door Rollers with Double Seal with 8 BallsPRODUCT ADVANTAGES1. Our quiet garage door replaceable wheels are made of flexible, corrosion-resistant, wear-resistant nylon material. The roller bar is made of strong carbon steel that resists deformation, bending, and rust and can withstand the weight of heavy doors.2. Long-lasting garage wheels open and close quietly along the track, ensuring minimal noise when opening and closing. At the same time, with smooth bearings for smooth rotation and low friction. The reinforced 6200zz bearing seal design prevents dust and dirt from entering, making the opening and closing of the garage door smoother and more unobstructed.ATTENTIONPlease check the dimensions before purchasing.